Epson Perfection 640U Series Produkt-Support-Bulletin - Seite 6

files). While these numbers show the maximum limits and capabilities of the Perfection 4870 series scanner, it

is generally not recommended to scan files with this much data. Even with today's fast computers with lots

of available resources, these files would take an extremely long time to scan and the resulting files

would not be manageable for editing or printing. To avoid extremely large file sizes, try using 24-bit Color

or 8-bit Grayscale instead of 48-bit Color or 16-bit Grayscale. You will still benefit from the scanner's

capabilities since the software uses 16-bit per channel input and then converts it to 8-bit per channel output. If

you must scan high resolution with 48-bit Color or 16-bit Grayscale with DIGITAL ICE also consider using the

LaserSoft® Imaging Inc.SilverFast® Ai 6 scanner driver (see the last 2 paragraphs of this document

for more information on the SilverFast Driver).

Additional specifications and functional limitations of DIGITAL ICE and Epson Scan:

1) DIGITAL ICE is best used for fixing surface defects, scratches, smudges and fingerprints which can appear

in the final image. If a piece of film is dusty or dirty, it is recommended that normal film cleaning products be

used before using DIGITAL ICE to minimize the resources and scan time needed to process a scan. Consult

your local camera store or a trusted Internet web site for more information on film cleaning products

and procedures.

2) Although the documentation for the Perfection 4870 series scanners may indicate dust removal for

photographs, DIGITAL ICE for Photo Prints is not intended for fine dust removal on photographs. Photographs

should be as clean as possible before scanning. We recommend cleaning photographs with a soft lint-free

cloth or gently applying air on the photos with a can of compressed air available at most office supply stores.

Note: Never use liquid cleaning products on photographs as permanent damage may occur.

3) Different scanner manufacturers use different implementations and default settings for DIGITAL ICE in their

products; therefore, results may differ from manufacturer to manufacturer. We at Epson America understand

our customers' concerns about staying true to the original image. In an effort to maintain customer satisfaction

and preserve image quality, Epson has kept the DIGITAL ICE settings on the Perfection 4870 series scanner

slightly conservative. Therefore, a DIGITAL ICE corrected image may still require minor editing to

completely remove artifacts from a damaged or dirty image.

4) DIGITAL ICE works best on an image scanned from an original defective image. It cannot remove

artifacts from a copy or reprint of an image in which a tear, scratch or defect appears as part of the image

and is not an actual surface defect.

5) Rotating an image 90, 180, or 270 degrees from the original position may result in better surface defect

detection and overall DIGITAL ICE image correction. A badly damaged image may get better results in one

orientation versus another. Testing in all 4 positions may be needed to get the best results.

6) DIGITAL ICE supports the following image types: 48-bit Color, 24-bit Color, 16-bit Grayscale, 8-bit

Grayscale. The other image types--Color Smoothing/Halftone/Black & White--will disable DIGITAL ICE.

7) When scanning at very high resolutions or creating extremely large image files with Epson Scan the TIFF

(*.tif) file format must be used; other image file formats may generate an error when saving the file.

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